烟叶中淀粉含量测定方法的比较

Comparison of Detection Methods for Starch in Tobacco

摘要:

分别研究了烟叶中检测淀粉含量的三种方法，通过相对标准偏差和回收率的对比对三种检测方法进行了分析。结果显示：酸解法的相对标准偏差为2.26%，回收率为107.86%；碘显色法的相对标准偏差为1.0397%，回收率为98.45%；高氯酸萃取-连续流动法的相对标准偏差为1.33%，回收率为98.63%。酸解法的检测结果的精密度准确度明显不如其它两种，碘显色和连续流动法的精密度准确度则比较接近，且都较适合烟叶中淀粉含量的检测，适合广泛应用。

Abstract:

Three detecting methods for starch in tobacco were compared by parallel test and standard recovery. Results showed relative standard deviation and the recoveries of starch of the acid hydrolyzation was 2.26% and 107.86%, respectively. Those of the iodine coloration methods were 1.0397% and 98.45%, respectively. For continuous flow methods, the relative standard deviation and recoveries of starch were 1.33% and 98.63%, respectively. The accuracy of acid hydrolyzation was worse than the other two methods. The accuracy of iodine coloration was close to the cont inuous,, thus both of the two methods can be adapt to detect starch in tobacco.